but considering that the delivery delay between Signature and Regular will be so big, at least 6 months. The difference in features would have to be very big for the post people to really skip the Sig reservation.
Also I dont think there are to many people thatdid it the way you did it.
And all the Sig reservations are soldout anyway, so all reservation from the time they were sold out (months ago) wont have the double reservation method you have.
I do not know the actual number of people with double resevations but there are a few of us. Few could be 5, 10 or 100, I have no idea but I do know that a few people both on TMC and TM forums have commented they have done the same. I doubt the number is really significant, I just brought up the point because of a question of how the S cancellation rate may help us with the X cancellation rate.